About: http://webisa.webdatacommons.org/87085166

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	i.e. how do you know if the browser has a copy in the first place so that it is safe to do a 304 instead of a 200, i.e. send image back?
http://www.w3.org/ns/prov#wasQuotedFrom	spring.io